Nonstop flight route between Perth, Western Australia, Australia and Helena, Montana, United States:

About this route:

A direct, nonstop flight between Perth Airport (PER), Perth, Western Australia, Australia and Helena Regional Airport (HLN), Helena, Montana, United States would travel a Great Circle distance of 9,728 miles (or 15,656 kilometers).

A Great Circle is the shortest distance between 2 points on a sphere. Because most world maps are flat (but the Earth is round), the route of the shortest distance between 2 points on the Earth will often appear curved when viewed on a flat map, especially for long distances. If you were to simply draw a straight line on a flat map and measure a very long distance, it would likely be much further than if you were to lay a string between those two points on a globe. Because of the large distance between Perth Airport and Helena Regional Airport, the route shown on this map most likely appears curved because of this reason.

Try it at home! Get a globe and tightly lay a string between Perth Airport and Helena Regional Airport. You'll see that it will travel the same route of the red line on this map!

Departure Airport Information:

Arrival Airport Information:

Facts about Perth Airport (PER):

• From 1962 onwards, both the domestic and international passenger operations at the airport were provided by a single terminal.
• Towards the mid-1950s, airline travel was still only being used by a small percentage of the population.
• At this time also, airline operators Qantas and Ansett set about on ambitious capital works programs to construct new domestic terminals for their respective airlines on the northern side of the terminal, where they still stand to this day.
• Perth Airport handled 13,664,394 passengers last year.
• The airport only received international status and was renamed to Perth International Airport in 1952.
• Perth Airport (PER) has 2 runways.
• It was at this time the airport began to experience the full effects of the jet age.
• The furthest airport from Perth Airport (PER) is L.F. Wade International Airport (BDA), which is nearly antipodal to Perth Airport (meaning Perth Airport is almost on the exact opposite side of the Earth from L.F. Wade International Airport), and is located 12,389 miles (19,938 kilometers) away in Ferry Reach (near Hamilton), Bermuda.
• Despite military use of the airfield, civil services operated by Qantas Empire Airways and Australian National Airways commenced from the location in 1944.
• The closest airport to Perth Airport (PER) is Jandakot Airport (JAD), which is located only 12 miles (19 kilometers) SSW of PER.
• Full civilian operations at the Guildford Aerodrome commenced in 1944.
• Because of Perth Airport's relatively low elevation of 67 feet, planes can take off or land at Perth Airport at a lower air speed than at airports located at a higher elevation. This is because the air density is higher closer to sea level than it would otherwise be at higher elevations.

Facts about Helena Regional Airport (HLN):

• Helena Regional Airport (HLN) has 3 runways.
• The furthest airport from Helena Regional Airport (HLN) is Sir Gaëtan Duval Airport (RRG), which is located 10,563 miles (17,000 kilometers) away in Rodrigues Island, Mauritius.
• Helena Regional Airport covers 1,224 acres at an elevation of 3,877 feet.
• The closest airport to Helena Regional Airport (HLN) is Bert Mooney Airport (BTM), which is located 51 miles (83 kilometers) SSW of HLN.
• In addition to being known as "Helena Regional Airport", another name for HLN is "Helena Army Airfield".